When All Return to the Waters is the third part of the Archon Quest Chapter 4, Act II in Genshin Impact. See how to unlock this quest, its walkthrough, and all the rewards of this quest here in this guide!

How to Unlock When All Return to the Waters

Complete The Truth, Lost With the Rain

To unlock When All Return to the Waters, you must have completed the previous subquest of As Light Rain Falls Without Reason, The Truth, Lost With the Rain!

The Truth, Lost With the Rain Quest Guide

When All Return to the Waters Walkthrough

Find a way to get underwater

Go to northeast of the Court of Fontaine, and find a way to get underwater. Simply dive down once you've arrived by the shore, then go to the place Melus mentioned to inch closer to the Sinthe production base.

Find the entrance to the “headquarters”

Once underwater, find the entrance to the “headquarters” by continuously swimming forward until the camera pans to an entrance to your left. There should be a lone Hydroculus by it, to help you should you get lost! Proceed deeper within to investigate.

Refute the Incident of “Callas the Unfaithful”

After the POV changes from yours to Navia's, you'll find yourself inside the Opera Epiclese, with Navia interjecting on Childe's trial. Neuvillette then asks Navia of the person she's accusing. Select the Information about Marcel to proceed!

Refute the Incident of “Callas the Unfaithful” Cheat Sheet

How to Refute the Incident of “Callas the Unfaithful”

	Objectives
1	Wait for Neuvillette to recount the events of the night when Jacques was supposedly shot by Callas.
2	Once done, you have 5 statements from Neuvillette that you can refute to convice the Oratrice and the audience that Callas didn't shoot Jacques.
3	For Statement I: The Banquet, do not refute.
4	For Statement II: Two Gunshots, select the Testimony From Jacques' Family evidence to refute. This changes the statement to Jacques' Request.
5	For Statement III: The Scene of the Crime, select Callas' Case Records to refute. This changes the statement to The Third Person.
6	For Statement IV: Reconstruction of Events, select the Primordial Seawater to refute. This changes the statement to The Murderer's Disappearance.
7	For Statement V: Injustice and Silence, do not refute.

Look for clues in the headquarters' depths

The POV again changes back from Navia's to the Traveler's, after successfully refuting the Incident of “Callas the Unfaithful”. This time, look for clues in the headquarters' depths.

How to Reach the Headquarters' Depths

How to Look for Clues in the HQ's Depths

	Objectives
1	As soon as you step inside, make a sharp turn to the left, and head to the chests. Examine the Miscellaneous Objects first. After going thru the contents of the chests, obtain The Missing Person's Possessions..
2	Then, walk to the right until you see a table and, stacks of bottles. Examine the bottles first. After perusing thru the bottles, obtain a bottle of Sinthe.
3	Next clue is just a few steps away from the bottles, to your right. Examine the Experiment Table, and obtain Vacher's Experimental Records.
4	Then, walk a bit to your right, towards the pool. Examine the Pool, and obtain Primordial Seawater Pool.
5	Afterwards, head to your right, and Examine the Bookshelf. Once you're done reading through the report, obtain the Callas' Investigation Report.

Analyze the clues you've found with Paimon

After obtaining the first five clues, analyze the clues you've found with Paimon. You then realize, the clues you've gotten so far aren't enought to incriminate Vacher to the crimes.

Look for Clues Related to Vacher

You and Paimon decide to look for clues related to “Vacher”. Simply head to the stacks of chest again, where you first obtained The Missing Person's Possessions, and get Vigneire's Notebook after a few while.

Race back to the opera house and submit the evidence

After obtaining all the clues from the Sinthe base, race back to Opera Epiclese, and submit the most reasonable evidence to the question of Neuvillette. Select Vigneire's Notebook as your most reasonable evidence, to progress the quest.

Leave the opera house

Once things have concluded in Marcel's Trial, leave the opera house. Soon after, you'll meet a pleading Vacher, asking you to bring Marcel to the fountain plaza.

Talk to Neuvillette

When all things from Marcel's death, and the case of Callas have dissipated, accompany Navia to his father's grave. After leaving Navia and the Iudex to their own, to talk about things, talk to Neuvillette.

When All Return to the Waters Rewards

Total Quest Rewards

Total Quest Rewards
Primogem x30	Mystic Enhancement Ore x11	Mora x58200
Memory of Running Stream x1	Hero's Wit x5	Adventure EXP x1325

Genshin Impact Related Guides

All Quests and Quest Types

Other As Light Rain Falls Without Reason Quest Guides

As Light Rain Falls Without Reason Quest Line Guide

All Fontaine World Quests Guide

List of World Quests